Escapement device for typewriting machines



l L. P. DISS.

ESCAPEMENT, DEVICE FORv TYPEWRITING MACHINES.

APPLICATION FILED OCT. I. i920.

PatetedSept. 12

3] vwc wtozv imm@ Urbanus y L. Pl mss. I ESCAPEME'NT DEVICE FORTYPEWRITING MACHINES* 1 i Patented Sept. 12

APPLICATION FILED OCT-1. |9211l 2 SHEETS-SHEET 2.

i@ W111i l 40 f of thestated facts it will be readily lseen 45 typabarmechanism', a lighter touch and vices for Typewritinfr I Patented Sept.12,- 1922.

LouIs P. nIss, or ILIoN, nEw'Yonk.

nscA-PEMEN'I DEVICE Fon TYPEWRITING MACHINES. l

apencatioh med october 1, 1920. serial No.' 414,0637..`

To all, whomzft may concer-n: Be it known that I, LoUIs P.'DIss, acitizen of theA UnitedStates, and a resident of Ilion, in the county ofHerkimer and State of New York, haveinvented certain new and usefulImprovements lin Escapement De- Machines; and I do hereby declare thatthel following is a full, clear, and exact description thereof, whichWill kenable/.others skilled in the art to which it appertains to makeand use the same, reference being had to the accompanying drawings, andto the reference numerals marked the1eon which yform part of thisspecification. C

My present invention relates to letteri spacing escapements fortypewriting machimes. U

The object of'said inventionv is to eliminate the usual burden placed onthe typebar mechanism of operating thea escapement against the force ofthe dog rocker and uni versal bar-restoring `spring fir-springs.'- It iscommonly understoodv that the said bulden'v places a. great strain onthe type-bar pivots and that it is practically. impossible to place theburden equally on both ends of the pivot bearings and that .thereforesidewisev cramping of the type-bars will be effected.` This crampingwill continue until the instant of t-hecommencement ofthe ref turnmovement ofthe type from the platen, atwh-ich instant the actuation ofthe typeba-r. by` will-be seen thatonthe instant of the change fromthetype-bar being the actuator tothe ac.tuated, the typebar will loe`rfreed from thegcrampin strain :and will vibrate to its normal. conition-.and thereby. effect the blurring yofthe type impressions. In,view that 'theY elimination. of the iusual burden placedv on thetype-bar mechanism will not only electfimproved type impressions butwill also effect greater. dura-.bility of the greater manifoldingpowerall of which are further objects of my invention'.

Figure 1. is .-a Yrear elevation of a letterspacing escapementembodyingymy inven Fig. 2 is an end view of said devicelooking at theleft end y'as thedevice is shown in Fig. 1, but with the escapementwheel shown in section in line with the faceof the engaged tooth.`

the, universal bar commences. 'It

Fig. 3 isy afront shown in Fig. 1.y

elevation fofthe device Fig"4 is a topir Plan-view of the Parts' shownin Fig.

t 1 but for the sake of clearness `showing the Figs. 5, 6 and] 7 arerespectively leftend, y

front elevation andv` the dog rocker 14. .Y v Fig. 8 is a rearview'ofthe spacing dog ,15 anduits shaft 15?. 'y l I bottom plan. viewsvof F1g.'9` is a topvievvQQf dog l I and its shaft. v I. F ig.l 10 is alrear elevation.y of the yspacing dog 15,;its shaft 15a andthe collar16sl l' Fig. 11 is a bottom (Ir-inverted plan View f` of the parts showninFig.-10. r Figs. 12 and'll are.respectivelyrrearele# vation and topior plan views of the holding Figs. #14, 15, 16a-nd 17y are4wrespectivelyy f `tracting the universalfbar,arevoperatively but theholding z connected to the spacingfdog door is ofthe fixed type.y

eferring AHrst to the invention. illustrated in-fFigsj 1 ;to 18- in.elusive, the .-escapement wheel 27 having the usual teeth.

lembdiiiiatfof iur 28gismounted as is usual to revolve in'aavertical-fplaney parallel to the=line ofl the movement of thecarriagfe and operatively .-.v connected therewith and with thefmainvspring inthe welt-known manner not shown In the drawmgsnwllhe tensionof lthe mainispring or: carriage springk is to-"revolvethe escapeinentwheel 1n the direction rvindicated in Figs. 1` and' by arrowsl i f Thedogrocker isrnounted itslongi. -tudinally projecting -pivots 22 in@bearings extending downfrom` the topy plate :ofy ,the

typewriter,machin'e; in the ,usual 'mannerv and for 'the .sake ofclearness not shownin isat right angles tothe axisof the :escapes mentWheel.l lThe Ydogroclrer isof .i1-regna.' Iarshape aswill be vvevident.from aniinspection ofFigs..j5to 7 inelusive.f Upon the dog ...rockervarepivotally vnnfiu'nted the l the drawings@A The ixisfoftlie dogrocker.1.- i

- 28 ofthe escapement wheel.

spacing dog 15 and the holding dog 17 each with its pivotal aXis atright angles with the axis of the dog rocker.

Swingingly mounted upon the pivots 22 pivots 22 and allow the oscillatorto have a swinging motion independent of the dog rocker or of course toswing with the dog rocker. 1 j

The spacing dog 15 by means of the spacing dog shaft 15aL rigidlysecured to said spacing dog is pivotally mounted upon the dog rocker 14with the spacing dog 15 at the front of the body of the dog rocker-orupon the farther side as seen in Fig. 1 or the near side as seen in Fig.3. The spacing dog shaft 15a projects through a suitable bearing in thedog rocker 14 and has its rear end provided with a collar 16 to preventendwise displacement of said shaft. The collar is held in desiredposition upon the shaft 15a by set-screw 16a. From the collar 16projects to the left as the parts are seen in Fig. 1 the arm` 34 beneathwhich engages one end of a spring 30 coiled about the sleeve 14EL on dogrocker 14 with its opposite end 35 engaging the right hand edgeof thedog rocker as seen from the rear whereby said spring tends to move saidspacing dog to the right as shown in Fig. r1 or to the left as moreclearly shown in Fig. 3. As see-n in Fig. l3 a stop-screw 31 mounted inthe dog rocker 14 limits the motionof said spacing dog to the left. Ashoulder 32 upon said dog rocker limits the movement of the spacing dogto the right as seen in this Fig. 3 at the position which is the stateof rest position of this dog when it is retracted against the force ofspring 30 by the engagement'of one of the teeth In Fig. 3 there is shownin dotted lines the position of the spacing dog when free from theescapement wheel and actuated by the spring 30.

Upon the rear side or the near side of the dog rocker 14 as seen in Fig.1 there is pivotallyy mounted the holding dog 17 Towards its lower endsaid dog is provided with oppositely extending arms 17a and 17b withtheadjusting screw 25 set into arm 17 b` with the end of said screwprojecting through said arm. Similarly the adjusting screw 33 is setinto the right-hand arm as the parts are seen in Figs. 1, 12 and 13 withthe end of said adjusting screw `extending beneath said arm and engagingthe upper surface of the arm 34 projecting from collar 16 which issecured to the shaft 15 of the spacing dog. It will now be seen that thetension of said. spring 30 not only tends to move said spacing dog 15 tothe right as the parts are seen in Fig. 1, but also through properadjustment of set-screw 33 tends to move the holding dog to the left. Anad justing screw 19 set in the ldog rocker 14 to the left of the holdingdog 17 as seen in Fig. 1 arrests the movement of saidy dog to the leftwhile the adjusting screw 2() to the right of said holding dog arreststhe movement of said dog to the right at a point in line with the stateof rest position of the spacing dog 15.

Upon theJ oscillator 18 there is provided a rearwardly extendingshoulder 24 against which bears the lowerY end of said screw 25 in thearm 17b of the holding dog 17. To a downwardly projecting rigid arm 18aupon l the oscillator is pivotally connected the rod 23 which in turn isconnected to the universal bar 50 and type bars (not shown) in suchmanner that operation of the type bars imparts motion to the right inrody 23 as seen in Fig. 2.

The first result of this movement of connecting rod 23 to the rear willbe to swing the oscillator 18 on the pivots 22 to the rear independentlyof the dog rocker. This motion of the oscillator 18 will raise vtheshoulder`24 whichis tov the rear of and about on a level with'the pivots22. Since the adjusting screw 25 on the left-hand arm 17 "I is incontact with said shoulder 24, said adjusting screw 25 and its arm willbe raised carrying the holding dog 17 to the right as the parts are seenin Fig. 1 until such movement is arrested through said dog engaging theset screw 20. The position of the parts is now that illustrated in Fig 4with the spacing dog holding the escapement tooth 28 and the holding dogadvanced in line with the engaged edge of the escapenient tooth, butstill spaced therefrom throughv the dog rocker not having been movedbodily upon its axis. Further motion of the rod 23 it will be, obviouscan move the oscillator no further on its axis, and 'the holding dog nofurther on its axis, but will operate to move the dog rocker 14 throughits pivots 22 moving in their bearings. Insuch movement'the lower partof the4 dog rocker will swing to the rear and the part of the dog rockerabove its axis will swing to thel front. yAnd in this last movement theoscillator 18 and the holding dog 17 andthe spacing dog 15 will movewith the dog rocker, but without moving relative to the dog rocker. Theresult of this movement will be to swing the-spacing dog 15 out ofengagement with the tooth 28 of the escapement wheel and to bring theholding dog into engagement with the said tooth. This position of theparts is shown in Fig. 18 which for the purpose of illustration showsthe parts before the spacing dog has moved from its position in linewith sake of clearness .thezdogrocker 14 isa-lso other `partsl ofthedevice extend abovethat' line.

f VAs .soon as lthe spacing'dog d iseniy gaged lfro'm' the tooth 28ofthe y es'capeinent Wheel 27T-said spacingdog tends to make itssteptowards fthe vneigt succeeding toothror towards fthe right as the partsare seen in Fig.v 1 or ltowards the left as the parts` are seen in Fig.3. This stepping motion is pro' duced through the l.tension of spring 30which is placed under reactive tension by the last'part ofthe advancingmovement of the carriage at the last preceding letterv space movementand as will be further `ex= plained herein.` rl `he spacing dogisfliinited to a short step as mdieated in ig. 3,- the-object `being toemployvan unusuallystrong springBO.

reached the platen` the holdingy dog; Will have been brought into`.engagement with the-tooth of the esoapement Wheel as above describedland as shovvn'inli ig. 18 and at'thatrinstant the spacingldog? /15starts its motion-under the tension of spring 30. At-the sametilnez' thetension of the spring BQbegins the initialretraction of the holdingd'og17. 4jThel `reason for this is that as soonl as the spaoingf dog isclear lof thefe'scapement tooth 'the` spacing dogspring exertsitstension -'up-1 Wardly through'arm 34 vvhi'ch ymoves-'With`v thespacing-dog and thereby moves the right-hand arm 17a of the holding'do'gup? WardV as the partsare'fseen in'Fig'. 1=Whieh obviously retracts the'holding dog from the tooth of the escapementAV Wheel and leavestheescapement Wheel at oncefree to revolve,`

thereby allowing thev carriage vtoa-#once startfits movement. AThespring 3Q Veffects a singley movement of thel holding vdogvwhich is fromthe tooth ofthe 'esca-pement Wheel' and in a planeparallel to the plane'ofthe escapemnt wheel.' `The extent of said move-y ment is determinedby the'stop screw 19, the

adjustment-of which determines the time of" commencement of the rockingmovement of the dog' rocleifandthe'dogs to theirnorm'al or state of restl positions, f tl'i'e time of said commencement 4depends on the'abruptness rocking movement.

with which it vmay-be desired `to eiect said 'f' I immediateconnectionlvv'ith the armaif-y and so I in position to be at. onceforcibly retracted V lI have shown inFigfQ a fdog rocker spring 39attached to a dovijnwardly\extendinglug upon thegdog rockerftending to"draw the'y dogv rocker back to normal' or lstate otfrest.

position.y This' dogrockei'vspring will 'be necessary if the holdingdogfhas the' usuali flat face. The dog rocker spring isnot necessary andmaybe entirely-omitted Where' the holding dog has the bevel laoe 17as'shownv in Figs. Lland 18 ofthe drawings for restoring the spacing dog toyits positionf'to:

arresty the carriage through.thefadvancing l' teeth iof the.vesca-pement Wheel "coming into;`

camming engagement with said bevelfacegof j I the `holding dog! andythereby restoring the Y dog=rooker to normal position.- The'conestruction and operation of vsaid beveled hold-.= ing dog isfurtherset-forthand claimed in m 'pending application. Serial No.`873,006."

Aeanwhile. the return of the` dogrv rocker toward vitsnormal positionhas brought ythe andcorrespondingly of the carriage 4under the lpower ofthe-main or carriagel sprmghas moyedfsaid spacingdog" back or tothe leftas Ytlleparts are seenVinj Fig.- 1f andi-again iov placed the spring 30under reactive tension: i

The Vspring 30 yis 'muclijstronger than thef'l usual springrused simplylto` move an :ordi-f v f nary spacing dog'and'in vfactapproachesor-j fInstantaneously with the type `havingV approximates fin *strength .thestrength lof oidentY to theisuddenstoppingof` theicar-f,

riage. The strength of saidspringy 3() may in fact be about equal tovthe lforceyof-the 95,. carriageeactua'ting spring as thejinertia-ofthecarriagewill complete its letterfspace" movement a'gainsttlieequalstrengthf'of the :A

spring, 30. ff

As the spacing dog 15 'is ythus pressed' baolc into its normal orholding"position as rolearlyi .spring `301has been `placed under reactivetensioni andfremainsl so untilfthe` spacingdog i's/againvdisengaged fromthe ,escapemenb tooth. fIt-'Will` bennderstood5 however; thatitheyholding J indicated inv Fig. l3 the dog.. 17 will remailr'inits statelof`restizzosi- 7 Will beunderstood that-thelset' sorewgj on` i arm 17a oftheholding dog hasiemained in upward position and thatfaccordingly the iholding dog-17 is freeto move 'forward inf line ,with the'toothofthe'escapementwheel at the beginning' 'of thejnext "operationvvithiout havingto over-come any resistaneefro'm spring 30.l It is onlyiaftertlief'holdingf-dog f has 'advanced'to'thepositionfshovvnsin full linesin Fig. 1- thatfthe vholding'dogf'isnin' bysprngff() assoonl as' thespacing dog' Referring to the"embodimentv off-my in;

`Whether asaseparate piece-'secured 'to 'the' 'f 'isanielnberLilfsimilar' tothe lower end off dog =rocker loras integral With- ,thedog V rocken-Movably mounted onlthe dog rocker= .i

the stepping holding dog 17 heretot'oredescribed and justv above itsaxis provided With oppositely extending arms `41-a and 41b alsosimilar-in connection andform to the previously described; arms-17a and17b respectively onv said stepping holding dog 17. rl`he upstandingportion of said` member 41 is providedfor affording convenient means forsaid member 41 to be stopped by stop-screw7 2O as heretofore describedand so end the independent motion ot the oscillator 18 and then causethe dog rocker 14- to move on its axis all as hereinbei'ore described.

-It will noiv .be seen that the connection Jfrom the universall barthrough the connectand'its arms 41a and 411 tothe stepping spacing dog15 are the same as previouslyv described with reference to thecorresponding parts in the other form ofmy .invention land Will have thesame effect in that the stepping spacing dog `15 When released Willactuate said ymember 41 and thereby the oscillator 18 andtherod 23 andso lcause initial restorationof theuniversal bar. In other. Words, myinvention of means retracting the'universal bar from a stepping spacingdog may be utilized Without having the said means also connected as4first described-to a stepping holding dog. d

Both forms of myv escapement device are adapted for use with theso-called Remington No. 12 typewriting machine.

vIt Will also be seen that the strength ofthe carriage-actuating springWith my escapement isA only lmntedby a tolerable resistanceto vtheretraction of the carriage While the .usual highjspeed escapements whichare non-holding-dog escapements are limited by tolerable letter spacing.The let-v ter spacing of non-holding-dog escapements being dependent onthe uniformity of lingerlrey, manipulation and the velocity of thecarriage, the alternative is a compromise between speed and accuratespacing.

VVhatI claim as new, and desire to secure by LettersPatent is: Y, I l

.1. In a letter spacingescapement for typewriting machines, thecombination with a spring'tensionedcarriage and a toothed escapementmember operatively connected thereto, of a movable holding dog, asteppingspacing dogarranged to stop the car` rlage'at the end ofitsletter*y space movements, ra spring placed-under reactive tension by themovements of thev carriage and adapted ,toactuate said spacing dog, andto effect initial retraction of the holding dog on the instant of thetypey reaching the platen.

, 2. .In a letter spacing esca pement 'for type- Writing machines, thecombination with a spring tensioned, carriage and a toothed escapementmemberl operatively connected thereto and a universal bar, of a movableing rod 28, the oscillator 18, Ythe member 41.

holding dog, a stepping spacing dog arranged to stop the carriage at theend of its letter space movements, a spring placed nnder reactivetension by the movements of the carriage and adapted to actuate saidspacing dog, and to effect initialretraction of the holding dog and theuniversal. bar on the instant of the type reaching the platen.

3. In a letter spacing escapement for type- Writing machines, thecombination With a spring tensioned carriage and a toothed escapementmember operatively connected thereto, of a movable holding dog, astepping spacing dog arranged to stop the carriage at they end of itsletter space movements. a spring placed under reactive tension-by themovements of the carriage and adapted to actuate said spacing dog, and.means also actuated by said last-named spring whereby initialretraction of said holding dog is effected on the instant 'of the typereaching the pla-ten.

4. 1n a letter spacing escapement for type- Writing machines, thecombination with a spring tensioned carriage and a toothed escapementmember operatively connected thereto, of a stepping holding dog, astepping spacing dog arranged to stop the carriage at the end ofitsletter space movements, a spring placed under reactive tension by themovements of the carriage and adapted to actuate said spacing dog, andmeans also actuated by said last-named spring whereby initial retractionof said holding dog is effected on the instant of the type reaching theplaten.

5. In a letter spacing escapement for type- Writing machines, thecombination With a spring tensioned carriage and a toothed escapementmember operatively connected thereto, of a dog rocker, a steppingholding dog mounted on said rocker, a stepping spacing dog mounted onsaid rocker, a spring placed under reactive tension by the letterspacemovements of the carriage and eifecting initial retraction of saidholding dog.

6. In a letter spacing-escapement for type- Writing machines, thecombination with a spring tensioned carriage and a toothed escapementymember operatively connected thereto, of a. dog rocker, asteppingholding dog mounted on said rocker, a stepping spacing dog mounted 'onsaid rocker, a spring placed under reactive tension by the letter spacemovements of the carriage and effecting initial retraction of saidholding dog, said spring being of suilicient strength relative to thecarriage spring to form a cushion for the arrest of the carriage duringthe latter part ot its letter space movement.

7.- ln a letter spacing escapement for type- Writing machines, thecombination with a spring tensioned carriage and a toothed escapementmember operatively 'connected thereto, of a dog rocker, a steppingholding dog mounted 'on said rocker, a

spacing dog mounted on said rocker, a spring placed under reactivetension by the letter space movements of the carriage and actuating saidspacing dog and effecting initial retraction of said holding dog. 8. Ina typewriting machine the combination of a letter spacing escapementhaving a holding dog and a spacing dog oscillatingly mounted on adogrocker, a spring actuating said spacing dog, power being stored in saidspring lbythe letter space movement of the movement of the escapementmember.

10. In a typewriting machine, a letter y spacing escapement having atoothed escapement member, a spacing dog, a holding dog and a dog rockercarrying said dogs,

means in whichpower is stored by the carriage in the ending of itsletter space movement and means whereby said power is utilized fortheinitial retraction of the dog rocker and the holding do in the directionof the feed movement of the esoapement member.

stepping v dog instantaneously with 11. In a typewriting machine thecombi-r nation of a letter `spacing escapement having a toothedescapement member, a cushion arrested for the carriage to operate at theend.-` ing of its letter space movements and meansv t whereby the forceof said cushion will effect retraction'of the vholding dog in thedirection of the feeding movement of the toothed escapement"v memberinstantaneously with vthe type reachingthevplaten. v v

' 12. In a typewriting machine `thie combil nation of a letter spacinescapement having a spacing dog and holi belng vibratingly mounte'dfon adog rocker,y

the carriage being arrestedby` a] cushion at the ending of itsletterfspa'ce movementsa'nd- 5 means wherebyl the refaction of saidcushion will effect initial retraction of the holding the type reachingthe platen.

13. In a typewriting'machine -thercoinl'iif nation of a letter spacingescapementy having a spacing dog and a holding dogmounted on avibratingsupport, said dogs being arng dog, saiddogs j v ranged tovibrateindependent of andy to-fy gether with said support, the spacingdog being cushioned forar'resting the carriage at the ending ofits|letter spacemovements, and means whereby `the refaction o f;said

cushion' -will effect initial retraction offthe holding dog ontheinstant of the type reachingthe' platen. w l

In witness whereof I have affixed mysig-f.` i

nature, lthis'20 dayo'f,` September 1920. l i LouisfP. .Disse iv l

